CN116808704A - Silica sol concentration filter equipment - Google Patents
Silica sol concentration filter equipment Download PDFInfo
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- CN116808704A CN116808704A CN202310895235.0A CN202310895235A CN116808704A CN 116808704 A CN116808704 A CN 116808704A CN 202310895235 A CN202310895235 A CN 202310895235A CN 116808704 A CN116808704 A CN 116808704A
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 74
- 238000001914 filtration Methods 0.000 claims abstract description 51
- 238000003860 storage Methods 0.000 claims abstract description 33
- 238000012546 transfer Methods 0.000 claims abstract description 30
- 239000012528 membrane Substances 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 230000005484 gravity Effects 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 18
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a silica sol concentration filter equipment, includes ultrafiltration system, filtration system, interlocking control system, its characterized in that: the ultrafiltration system comprises a storage tank, a 1 st ultrafiltration device, a 2 nd ultrafiltration device, a ceramic membrane, and a stirring device arranged on the storage tank, wherein the filtration system comprises a transfer tank, a 1 st centrifuge and a 2 nd centrifuge, a liquid level meter is arranged on the side edge of the transfer tank, and the linkage control system is arranged on the side edge of the transfer tank. The silica sol concentration and filtration device of the invention ensures the uniformity of products; compared with the traditional method and the conventional ultrafiltration, the prepared product is better and lower in cost, and is controlled by adopting a linkage system, so that the automatic production is realized, and the stability of the product is ensured; the running cost of the whole process is reduced, the centrifuge is additionally arranged in front of the filter, the replacement frequency of the filter element in the subsequent filter is reduced, and the cost for replacing the filter element is reduced.
Description
Technical Field
The invention belongs to the technical field of silica sol manufacturing, and particularly relates to a silica sol concentration and filtration device.
Background
Silica sol belongs to colloidal solution, and is odorless and nontoxic; conventional particle sizes are nano-sized and have a substantial specific surface area. The silica sol can be widely applied to the fields of high cohesiveness, high temperature resistance, film forming property, gel property, chargeability, large specific surface area, innocuity, no odor and the like: precision casting, various integrated circuit grinding materials, CMP grinding fluid, ink-jet paper rubber, engineering plastics, paint, adhesive, packaging materials, cosmetics and other industries.
The conventional methods for preparing the silica sol comprise a Stober method and a silica powder method, the produced silica sol is subjected to solvent replacement and concentration by adopting the conventional reduced pressure distillation, and the rapid thermal concentration process not only can cause crystallization of silica gel on the kettle wall, but also can induce instability of a silica sol system due to local uneven heating so as to influence the dispersibility of the product; in addition, the process has high energy consumption and long period.
Aiming at the concentration of silica sol products, after the membrane concentration is carried out by using an ultrafiltration device conventionally at the present stage, different types of folding filter elements are loaded by using a filter barrel for filtering, and the products are recovered; a silica sol concentration filtration device as in patent CN 217340848U; however, this method has the following problems: (1) The silica sol product contains silica sol with small particle size and large particle size, and the conventional pp folding filter element (relative precision) cannot meet the requirement of particle filtration and removal and cannot remove small particles; when the filter element (absolute precision) is folded by using materials such as PTFE, nylon and the like, the filter element is easy to block and is frequently replaced, so that the cost is increased, the filtering time is added, the production efficiency is reduced, and continuous production cannot be performed.
Therefore, the known silica sol concentration filtration method has the above-mentioned various inconveniences and problems.
Disclosure of Invention
The invention aims to provide a safe and reliable silica sol concentration and filtration device.
In order to achieve the above object, the technical solution of the present invention is:
the utility model provides a silica sol concentration filter equipment, includes ultrafiltration system, filtration system, interlocking control system, its characterized in that:
the ultrafiltration system comprises a storage tank, a 1 st ultrafiltration device and a 2 nd ultrafiltration device, wherein the storage tank is provided with a stirring device, the lower part of the storage tank is provided with an online hydrometer, the 1 st ultrafiltration device and the 2 nd ultrafiltration device are respectively provided with a water outlet at the bottom, the water outlets are used for discharging clear liquid, the 1 st ultrafiltration device and the 2 nd ultrafiltration device are arranged in parallel and are respectively provided with a feed valve, a discharge valve and a discharge valve pressure gauge, the storage tank is used for conveying silica sol into a common pipe of the 1 st ultrafiltration device and the 2 nd ultrafiltration device through a bottom pump and a valve, the common pipe is communicated with the feed valves of the 1 st ultrafiltration device and the 2 nd ultrafiltration device, the common pipe is communicated with the discharge valves of the 1 st ultrafiltration device and the 2 nd ultrafiltration device, silica sol concentrated liquid can be returned to the storage tank, and when the silica sol concentration set value is reached, the storage tank is used for conveying the silica sol into the filtration system through the pump and the discharge valve;
the filtration system comprises a transfer tank, a 1 st centrifugal machine and a 2 nd centrifugal machine, wherein the side edge of the transfer tank is provided with a liquid level meter, the transfer tank conveys silica sol reaching a set specific gravity into a bottom shared pipe of the 1 st centrifugal machine and the 2 nd centrifugal machine through a bottom pump and a valve, the bottom shared pipe is communicated with a feed valve of the 1 st centrifugal machine and a feed valve of the 2 nd centrifugal machine, the top discharge valves of the 1 st centrifugal machine and the 2 nd centrifugal machine are communicated with the shared pipe to convey silica sol concentrated solution to an elevated tank, the side edge of the elevated tank is provided with a liquid level meter, the bottom of the elevated tank enters a product filter through the valve or a product through the valve to be collected as a product, or enters a residual liquid collecting tank through the valve, the side edge of the residual liquid collecting tank is provided with the liquid level meter, and the bottom of the residual liquid collecting tank returns to the transfer tank through the pump and a pipeline; the transfer tank conveys the silica sol which does not reach the set specific gravity into a residual liquid collecting tank through a bottom pump and a valve;
the linkage control system comprises the following control steps:
(1) The online specific gravity meter is interlocked with a valve at the bottom of the storage tank, when the online specific gravity meter displays that the numerical value does not reach the set value, the valves leading to the 1 st ultrafiltration device and the 2 nd ultrafiltration device are closed, and the valve leading to the return to the storage tank is opened; when the display value of the online hydrometer reaches a set value and is maintained for 30 seconds, valves leading to the 1 st ultrafiltration device and the 2 nd ultrafiltration device are automatically opened, and valves leading to a return tank are closed;
(2) The discharge valve pressure gauge of the 1 st ultrafiltration device and the 2 nd ultrafiltration device are respectively interlocked with the discharge valve of the 1 st ultrafiltration device and the feed valve of the 2 nd ultrafiltration device, and the pressure gauge pressure is controlled by adjusting the opening of the valve of the electric valve: 0.3-0.5 MPa;
(3) The bottom pump of the high-level tank is interlocked with the liquid level meter of the high-level tank, and the high-level tank is started and stopped; the feeding valve of the filter is interlocked with the high-level tank liquid level meter, when the high-level tank liquid level meter displays that the liquid level reaches the high level, the valve positioned in front of the filter is opened, and when the high-level tank liquid level meter displays that the liquid level is low, the valve positioned in front of the filter is closed;
(4) The pressure gauge at the top end of the filter is interlocked with the valve for entering the filter, and the pressure gauge at the top end of the filter displays the pressure of more than 0.5MPa, and the valve for entering the filter is closed;
(5) The liquid level meter of the residual liquid collecting tank is interlocked with the pump returned to the transfer tank, and the residual liquid collecting tank is started and stopped at a high speed.
The silica sol concentration and filtration device can be further realized by adopting the following technical measures.
The silica sol concentration filtration device, wherein the clear liquid contains silica with small particle size.
The silica sol concentration and filtration device is characterized in that the pump at the bottom end of the elevated tank is a metering pump.
The silica sol concentration filter device, wherein the valve is an electric valve.
The silica sol concentration and filtration device, wherein the 1 st centrifugal machine and the 2 nd centrifugal machine are tubular centrifugal machines respectively.
The silica sol concentration and filtration device, wherein the 1 st ultrafiltration device and the 2 nd ultrafiltration device are respectively provided with a ceramic membrane.
The silica sol concentration and filtration device, wherein the ceramic membrane can filter small-particle-size silica, and the micropore diameter of the ceramic membrane is 5-100nm.
The silica sol concentration and filtration device, wherein the filtration concentration control pressure of the 1 st ultrafiltration device and the 2 nd ultrafiltration device is 0.1-0.8MPa.
The silica sol concentration and filtration device, wherein the feeding speed of the 1 st ultrafiltration device and the 2 nd ultrafiltration device is respectively 200-650kg/h.
The silica sol concentration and filtration device, wherein the product filter is self-flow filtration.
The silica sol concentration filter apparatus as described above, wherein the tube centrifuge has a rotation speed of 14500-17000rpm.
The silica sol concentration filtering device is characterized in that the product filter is self-flow filtration, a folding filter element in the filter is made of PTFE or nylon, a surface microporous filter element is 0.22 mu m, the monitoring pressure gauge 33 displays the pressure within 0.1-0.5MPa, and the product is collected after filtration.
The silica sol concentration and filtration device, wherein the discharge pressure of the 1 st ultrafiltration device and the 2 nd ultrafiltration device is as follows: 0.3-0.5MPa.
After the technical scheme is adopted, the silica sol concentration and filtration device has the following advantages:
1. ensuring uniformity of the product; compared with the traditional method and the conventional ultrafiltration, the product prepared by the method is better and has lower cost;
2. the interlocking system is adopted for control, so that automatic production is realized, and the stability of the product is ensured; the running cost of the whole process is reduced;
3. and a centrifugal machine is additionally arranged in front of the filter, so that the replacement frequency of the filter element in the subsequent filter is reduced, and the cost for replacing the filter element is reduced.
Drawings
FIG. 1 is a schematic diagram of a silica sol concentration filter system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a silica sol concentration filter system process flow according to an embodiment of the present invention;
FIG. 3 is a raw material scanning electron microscope image of an embodiment of the present invention;
FIG. 4 is a post-ultrafiltrate scanning electron microscope image of an embodiment of the present invention;
fig. 5 is a scanning electron microscope image of a product according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to examples and figures thereof.
Example 1
The silica sol concentration and filtration device comprises an ultrafiltration system, a filtration system and a linkage control system.
Referring now to fig. 1, fig. 1 is a schematic diagram of a silica sol concentrating and filtering device according to an embodiment of the present invention. As shown in the figure, the ultrafiltration system comprises a storage tank, a 1 st ultrafiltration device and a 2 nd ultrafiltration device, wherein the storage tank is provided with a stirring device, the lower part of the storage tank is provided with an online hydrometer, the 1 st ultrafiltration device and the 2 nd ultrafiltration device are respectively provided with a water outlet at the bottom, the water outlets are used for discharging clear liquid, the 1 st ultrafiltration device and the 2 nd ultrafiltration device are arranged in parallel and are respectively provided with a feed valve, a discharge valve and a discharge valve pressure gauge, the storage tank is used for conveying silica sol into a common pipe of the 1 st ultrafiltration device and the 2 nd ultrafiltration device through a bottom pump and a valve, the common pipe is communicated with the feed valves of the 1 st ultrafiltration device and the 2 nd ultrafiltration device, the common pipe is communicated with the discharge valves of the 1 st ultrafiltration device and the 2 nd ultrafiltration device, the silica sol concentrated solution can be returned to the storage tank, and when the concentration set value of the silica sol is reached, the storage tank is used for conveying the silica sol into the filtration system through the pump and the discharge valve;
the filtration system comprises a transfer tank, a 1 st centrifugal machine and a 2 nd centrifugal machine, wherein the side edge of the transfer tank is provided with a liquid level meter, the transfer tank conveys silica sol reaching a set specific gravity into a bottom shared pipe of the 1 st centrifugal machine and the 2 nd centrifugal machine through a bottom pump and a valve, the bottom shared pipe is communicated with a feed valve of the 1 st centrifugal machine and a feed valve of the 2 nd centrifugal machine, the top discharge valves of the 1 st centrifugal machine and the 2 nd centrifugal machine are communicated with the shared pipe to convey silica sol concentrated solution to an elevated tank, the side edge of the elevated tank is provided with a liquid level meter, the bottom of the elevated tank enters a product filter through the valve or a product through the valve to be collected as a product, or enters a residual liquid collecting tank through the valve, the side edge of the residual liquid collecting tank is provided with the liquid level meter, and the bottom of the residual liquid collecting tank returns to the transfer tank through the pump and a pipeline; the transfer tank conveys the silica sol which does not reach the set specific gravity into a residual liquid collecting tank through a bottom pump and a valve;
the linkage control system comprises the following control steps:
(1) The online specific gravity meter is interlocked with a valve at the bottom of the storage tank, when the online specific gravity meter displays that the numerical value does not reach the set value, the valves leading to the 1 st ultrafiltration device and the 2 nd ultrafiltration device are closed, and the valve leading to the return to the storage tank is opened; when the display value of the online hydrometer reaches a set value and is maintained for 30 seconds, valves leading to the 1 st ultrafiltration device and the 2 nd ultrafiltration device are automatically opened, and valves leading to a return tank are closed;
(2) The discharge valve pressure gauge of the 1 st ultrafiltration device and the 2 nd ultrafiltration device are respectively interlocked with the discharge valve of the 1 st ultrafiltration device and the feed valve of the 2 nd ultrafiltration device, and the pressure gauge pressure is controlled by adjusting the opening of the valve of the electric valve: between 0.5 MPa;
(3) The bottom pump of the high-level tank is interlocked with the liquid level meter of the high-level tank, and the high-level tank is started and stopped; the feeding valve of the filter is interlocked with the high-level tank liquid level meter, when the high-level tank liquid level meter displays that the liquid level reaches the high level, the valve positioned in front of the filter is opened, and when the high-level tank liquid level meter displays that the liquid level is low, the valve positioned in front of the filter is closed;
(4) The pressure gauge at the top end of the filter is interlocked with the valve for entering the filter, and the pressure gauge at the top end of the filter displays the pressure of more than 0.5MPa, and the valve for entering the filter is closed;
(5) The liquid level meter of the residual liquid collecting tank is interlocked with the pump returned to the transfer tank, and the residual liquid collecting tank is started and stopped at a high speed.
Example 2
FIG. 2 is a schematic diagram of a silica sol concentration filter system according to an embodiment of the present invention.
The silica sol concentration and filtration device comprises a storage tank 1, an online hydrometer 2, a centrifugal pump 3, ultrafiltration devices 4 and 5, pressure gauges 6 and 7, a transfer tank 8, liquid level gauges 9 and 17, tube centrifuges 11 and 12, an elevated tank 13, a liquid level gauge 14, a filter 15, a residual liquid collection tank 16, a plurality of electric valves and ultrafiltration device water outlets 34 and 35. The storage tank 1 is connected with the ultrafiltration devices 4 and 5, materials in the storage tank 1 are pumped into ultrafiltration membranes of the ultrafiltration devices 4 and 5 through the centrifugal pump 3 for filtration and concentration, a concentrated solution return pipeline returns to the storage tank 1, and clear liquid (containing small-particle-size silicon dioxide) is discharged through water outlets 34 and 35 of the ultrafiltration devices and is collected independently. The materials in the transfer tank 8 reach a set specific gravity after being concentrated by an ultrafiltration device, and the materials are pumped to the transfer tank 8 by a centrifugal pump 3; the transfer tank 8 is connected with the tubular centrifuges 11 and 2, the materials in the transfer tank 8 are respectively pumped into the tubular centrifuges 11 and 12 through the metering pump 10 for centrifugal operation, the materials in the tubular centrifuges are fed from bottom to top, and the centrifugally taken out materials are discharged into the overhead tank 13 for storage. The high-level tank 13 is connected with the filter 15, materials in the high-level tank 13 flow into the filter 15 through the gravity, the materials are filtered through the high pressure difference, and the filtered products are collected independently; the residual liquid before degumming and the residual liquid in the upper tank 13 of the tube centrifuges 11 and 12 are discharged into a residual liquid collecting tank 16. Pumping to a transfer pot 8 by a centrifugal pump, and centrifuging again for filtration and collection; the silica sol concentration and filtration device also comprises an automatic linkage control system.
The ultrafiltration devices 4,5 are ceramic membranes. The key function of the ceramic membrane is as follows: the ceramic membrane not only can carry out ultrafiltration dehydration, but also can screen and filter out silica particles with small particle diameters. The ceramic membrane can filter small-particle-size silicon dioxide, and the diameter of the micropores of the ceramic membrane is 100nm, so that the ceramic membrane can be determined according to the product requirement.
An online specific gravity meter is arranged in the storage tank 1; the ultrafiltration concentrated solution in the storage tank 1 enters the transfer tank 8, and the electric valves 19 and 20 are interlocked with the online densimeter 2. When the value displayed by the online hydrometer 2 does not reach the set value, the electric valve 20 is closed, and the electric valve 19 is opened; when the display value of the online specific gravity meter 2 reaches the set value and is maintained for 30s, the electric valve 20 is automatically opened, and the electric valve 19 is closed.
When the ultrafiltration devices 4 and 5 are used for filtering and concentrating, the pressure of the pressure gauges 6 and 7 is controlled to be 0.55MPa. The pressure gauge pressure is interlocked with the electric valves 22, 24, the electric valves adjust the opening of the valves, and the pressure value of the pressure gauge is controlled in a set range.
The transfer tank 8 and the residual liquid collecting tank 16 are respectively provided with a liquid level meter 9 and a liquid level meter 17; the head tank 13 is equipped with a level gauge 14.
The transfer tank 8 is connected with a tubular centrifuge through a metering pump 10, and the feeding speed of the tubular centrifuges 11 and 12 is 650kg/h; the set rotational speed of the tube centrifuges 11, 12 is 17000rpm; the set centrifugal force of the tube centrifuges 11, 12 was 18000g.
The filter 15 has an inner filter element of 0.22 μm and is made of PTFE or nylon. The tube centrifuge and filter action removes silica particles having a particle size > 0.22 μm. The pressure gauge 36 showed a pressure control of 0.55MPa.
The ultrafiltration devices 4,5 and the tube centrifuges 11, 12 are standby in the running and using process of the equipment, and the valves are automatically switched.
The interlocking control of the silica sol concentration and filtration device in production is as follows:
(1) The online specific gravity meter 2 is interlocked with the electric valves 19 and 20, when the value displayed by the online specific gravity meter 2 does not reach the set value, the electric valve 20 is closed, and the electric valve 19 is opened; when the display value of the online specific gravity meter 2 reaches the set value and is maintained for 30s, the electric valve 20 is automatically opened, and the electric valve 19 is closed.
(2) The pressure gauges 6 and 7 are respectively interlocked with the electric valves 22 and 23, and the pressure of the pressure gauges is controlled by adjusting the opening degree of the valves of the electric valves: between 0.5MPa.
(3) The metering pump 10 is interlocked with the liquid level meter 9, and is started and stopped at high and low; the electric valve 32 is interlocked with the liquid level meter 14, when the liquid level meter 14 displays that the liquid level reaches the high level, the electric valve 32 is automatically opened, and when the liquid level meter 14 displays that the liquid level is low, the electric valve 32 is automatically closed.
(4) The pressure gauge 36 is interlocked with the electric valve 32, and when the pressure gauge 36 shows that the pressure is more than 0.5MPa, the electric valve 32 is closed.
(5) The liquid level meter 17 is interlocked with the centrifugal pump 18, and is started and stopped at a high position.
The silica sol concentration and filtration device has substantial characteristics and obvious technical progress, and compared with SEM images of materials in different stages, the ultrafiltration device can screen out small-particle silica while concentrating; the tube centrifuge in combination with the filter can remove over 99% of the large particles. Most of large particles are removed by the centrifugal machine, so that the filtering pressure of the filter is reduced, and the product meets the control requirement.
Table 1 comparison of data at the stage of removal of large particles
| After ultrafiltration | Liquid outlet of centrifugal machine | Filter liquid (product) | |
| Large particle count/ml | 8871622 | 271031 | 18365 |
Table 1 is a comparison of the data from the large particle removal stage. Fig. 3 is a raw material SEM image of an embodiment of the present invention, fig. 4 is a post-ultrafiltration SEM image of an embodiment of the present invention, and fig. 5 is a product SEM image of an embodiment of the present invention. The silica sol concentration and filtration device can remove small-particle silica and large-particle silica on the basis of equipment automatic production, and ensure the uniformity of products.
The above embodiments are provided for illustrating the present invention only, and not for limiting the present invention, and various changes or modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present invention. Accordingly, all equivalent arrangements should be considered to be within the scope of the present invention as defined in the claims.
Claims (13)
1. The utility model provides a silica sol concentration filter equipment, includes ultrafiltration system, filtration system, interlocking control system, its characterized in that:
the ultrafiltration system comprises a storage tank, a 1 st ultrafiltration device and a 2 nd ultrafiltration device, wherein the storage tank is provided with a stirring device, the lower part of the storage tank is provided with an online densimeter, the 1 st ultrafiltration device and the 2 nd ultrafiltration device are respectively provided with a water outlet at the bottom, and the water outlets are used for discharging clear liquid; the 1 st ultrafiltration device and the 2 nd ultrafiltration device are internally provided with ultrafiltration membranes, the 1 st ultrafiltration device and the 2 nd ultrafiltration device are arranged in parallel and are respectively provided with a feed valve, a discharge valve and a discharge valve pressure gauge, the storage tank conveys silica sol into a shared pipe of the 1 st ultrafiltration device and the 2 nd ultrafiltration device through a bottom pump and a valve, the shared pipe is communicated with the feed valves of the 1 st ultrafiltration device and the 2 nd ultrafiltration device, the shared pipe is communicated with the discharge valves of the 1 st ultrafiltration device and the 2 nd ultrafiltration device, the silica sol concentrated solution can be returned to the storage tank, and when the concentration set value of the silica sol is reached, the storage tank conveys the silica sol into the filtration system through the pump and the discharge valve;
the filtration system comprises a transfer tank, a 1 st centrifugal machine and a 2 nd centrifugal machine, wherein the side edge of the transfer tank is provided with a liquid level meter, the transfer tank conveys silica sol reaching a set specific gravity into a bottom shared pipe of the 1 st centrifugal machine and the 2 nd centrifugal machine through a bottom pump and a valve, the bottom shared pipe is communicated with a feed valve of the 1 st centrifugal machine and a feed valve of the 2 nd centrifugal machine, the top discharge valves of the 1 st centrifugal machine and the 2 nd centrifugal machine are communicated with the shared pipe to convey silica sol concentrated solution to an elevated tank, the side edge of the elevated tank is provided with a liquid level meter, the bottom of the elevated tank enters a product filter through the valve or a product through the valve to be collected as a product, or enters a residual liquid collecting tank through the valve, the side edge of the residual liquid collecting tank is provided with the liquid level meter, and the bottom of the residual liquid collecting tank returns to the transfer tank through the pump and a pipeline; the transfer tank conveys the silica sol which does not reach the set specific gravity into a residual liquid collecting tank through a bottom pump and a valve;
the linkage control system comprises the following control steps:
(1) The online specific gravity meter is interlocked with a valve at the bottom of the storage tank, when the online specific gravity meter displays that the numerical value does not reach the set value, the valves leading to the 1 st ultrafiltration device and the 2 nd ultrafiltration device are closed, and the valve leading to the return to the storage tank is opened; when the display value of the online hydrometer reaches a set value and is maintained for 30 seconds, valves leading to the 1 st ultrafiltration device and the 2 nd ultrafiltration device are automatically opened, and valves leading to a return tank are closed;
(2) The discharge valve pressure gauge of the 1 st ultrafiltration device and the 2 nd ultrafiltration device are respectively interlocked with the discharge valve of the 1 st ultrafiltration device and the feed valve of the 2 nd ultrafiltration device, and the pressure gauge pressure is controlled by adjusting the opening of the valve of the electric valve: 0.3-0.5 MPa;
(3) The bottom pump of the high-level tank is interlocked with the liquid level meter of the high-level tank, and the high-level tank is started and stopped; the feeding valve of the filter is interlocked with the high-level tank liquid level meter, when the high-level tank liquid level meter displays that the liquid level reaches the high level, the valve positioned in front of the filter is opened, and when the high-level tank liquid level meter displays that the liquid level is low, the valve positioned in front of the filter is closed;
(4) The pressure gauge at the top end of the filter is interlocked with the valve for entering the filter, and the pressure gauge at the top end of the filter displays the pressure of more than 0.5MPa, and the valve for entering the filter is closed;
(5) The liquid level meter of the residual liquid collecting tank is interlocked with the pump returned to the transfer tank, and the residual liquid collecting tank is started and stopped at a high speed.
2. The silica sol concentration filter apparatus of claim 1, wherein said clear liquid contains small particle size silica.
3. The silica sol concentrating and filtering device according to claim 1, wherein the pump at the bottom end of the elevated tank is a metering pump.
4. The silica sol concentration filter apparatus of claim 1, wherein the valve is an electrically operated valve.
5. The silica sol concentration filter apparatus of claim 1, wherein the 1 st centrifuge and the 2 nd centrifuge are each tube centrifuges.
6. The silica sol concentration filter apparatus according to claim 1, wherein the 1 st ultrafiltration apparatus and the 2 nd ultrafiltration apparatus are each provided with a ceramic membrane.
7. The silica sol concentration filter apparatus of claim 6, wherein the ceramic membrane is capable of filtering small particle size silica, and the ceramic membrane has a pore diameter of 5-100nm.
8. The silica sol concentration filter apparatus according to claim 1, wherein the filtration concentration control pressure of the 1 st ultrafiltration apparatus and the 2 nd ultrafiltration apparatus is 0.1 to 0.8MPa.
9. The silica sol concentration filter apparatus of claim 1, wherein the feed rates of the 1 st ultrafiltration apparatus and the 2 nd ultrafiltration apparatus are each 200 to 650kg/h.
10. The silica sol concentration filter apparatus of claim 1, wherein the product filter is a gravity flow filter.
11. The silica sol concentration filter apparatus of claim 1, wherein the tube centrifuge is rotated at 14500-17000rpm.
12. The silica sol concentration filter device according to claim 1, wherein the product filter is self-flow filtration, a folded filter element in the filter is made of PTFE or nylon, a surface microporous filter element is 0.22 μm, a monitoring pressure gauge shows that the pressure is within 0.1-0.5MPa, and the product is collected after filtration.
13. The silica sol concentration filter apparatus of claim 1, wherein the discharge pressures of the 1 st ultrafiltration apparatus and the 2 nd ultrafiltration apparatus: 0.3-0.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310895235.0A CN116808704A (en) | 2023-07-20 | 2023-07-20 | Silica sol concentration filter equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310895235.0A CN116808704A (en) | 2023-07-20 | 2023-07-20 | Silica sol concentration filter equipment |
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